Improvement in stop-cocks



G. A. FISGEIER,l

Stop-Cook.

Ptented Dec. 3,1878.

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N- PETERS. PHDTDJJTHUGRAPHER. WASHINGTON. D. c,

'UNITED STATES PATENT OFFICE.

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IMPROVEMENT IN STOP-COCKS.

Specieation forming part of Letters Patent No. 210,454, dated December 3, 1878 g application led June 5, 1878.

To all whom it may concern:

Be it known that I, GUs'rAv ADOLPH Fiscu- ER, of Gorlitz, Prussia, have invented a new and useful Improvement in Plug Stop-Cocks, of which the following is a specication:

In the accompanying drawing, Figure I represents a longitudinal section of a plug stopcock embodying my invention. Fig. II is a horizontal section. Fig. III is a longitudinal section with the plug closed Fig. IV, a horizontal section of the same, and Fig. V a section at line x y, Figs. I and III.

' The nature of my invention consists in the construction of a plug stop-cock having perfectly-circular branches to it and pass a suitable boring-tool through the same for the purpose of perforatin g a conducting-pipe to which this cock is to be attached; further, in the arrangement of the plug and in the arrangement of an automa-tical draining-valve.

A is the chamber of the cock, provided with the usual two branches A and A for the connections. These branches are made perfectly cylindrical in their interior sections to allow the introduction and passing of a boring-tool, H, (see Fig. I,) through the same and the chainber A.

When the conducting-pipe P is to be tapped, a bridle, B, is attached at the desired place, into which the end branch, A', of the cock is screwed. A rlhe boring-tool H can then (as the branches A and A are perfectly cylindrical, and after the plug E has been moved upward) be passed through these branches to perforate this conducting-pipe P. During this operation a mutt', C, is fastened upon the branch A to guide the boring-tool H, and at the same time close this end of the cock. After the pipe P has been perforated or tapped, the boring-tool H is partly withdrawn, so that the plug E can be closed when the tool H is removed, preventing any waste or escape of gas or fluid except the small quantity contained in the branch A.

E is the plug, provided with ears e e on its upper end, working on the guides a a on the chamber. This plug E is operated by the screw-spindle F to move upward or downward in and out of its seat in the lower part of the chamber. Theupper part of the spindle passes through a suitable stuffing-box, d, in the cover of the chamber.

In the bottom of the chamber A a valve, Gr, is arranged, provided with a lever, g, and suitable spring z'. Vhen the plug E is opened this spring t' will keep the valve G closed. By shutting the plug the end of the same comes in contact with the lever g and opens this valve G, as shown in Fig. III. The opening of this draining-valve G is only performed when the plug is closed, so as to occasion no loss of steam or water. In the plug E a small opening, l, is made in the side of the branch pipe A to allow the water in this lateral pipe to pass through the draining-valve.

This stop cock may also be used as an ordinary stop-cock in any part of a length of pipes by dispensing with the draining-valve G.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. A circular valve-chamber, A, the interior circular surface of which forms the seat for the circular plug E, in combination with two branches, A and A, opposite each other and whose interior areas are perfectly circular in their sections, in the manner and for the purpose substantially as described.

2. In combination with a plug stop-valve, the draining-valve G, with lever g and spring i, arranged to operate in the manner and for the purpose specied.

GUSTAV ADOLPH FISCHER.

Witnesses FR. A. GERBER, A. E. GnIssLER. 

